General Motors option code

U57

U57: a General Motors factory option code reused for more than one part across 1967–1977 and 4 models — see the table for what it named each year, with installs and price where a source states them.

General Motors reused this code for more than one part over the years — read the "as named that year" column for what it meant on each row rather than assuming one meaning throughout.

4 models · 11 model years · 11 sources